drivers/scsi/aic7xxx/aic79xx_osm.c

   1 /*
   2  * Adaptec AIC79xx device driver for Linux.
   3  *
   4  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
   5  *
   6  * --------------------------------------------------------------------------
   7  * Copyright (c) 1994-2000 Justin T. Gibbs.
   8  * Copyright (c) 1997-1999 Doug Ledford
   9  * Copyright (c) 2000-2003 Adaptec Inc.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include "aic79xx_osm.h"
  46 #include "aic79xx_inline.h"
  47 #include <scsi/scsicam.h>
  48
  49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
  50
  51 #include <linux/init.h>         /* __setup */
  52 #include <linux/mm.h>           /* For fetching system memory size */
  53 #include <linux/blkdev.h>               /* For block_size() */
  54 #include <linux/delay.h>        /* For ssleep/msleep */
  55 #include <linux/device.h>
  56 #include <linux/slab.h>
  57
  58 /*
  59  * Bucket size for counting good commands in between bad ones.
  60  */
  61 #define AHD_LINUX_ERR_THRESH    1000
  62
  63 /*
  64  * Set this to the delay in seconds after SCSI bus reset.
  65  * Note, we honor this only for the initial bus reset.
  66  * The scsi error recovery code performs its own bus settle
  67  * delay handling for error recovery actions.
  68  */
  69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
  70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
  71 #else
  72 #define AIC79XX_RESET_DELAY 5000
  73 #endif
  74
  75 /*
  76  * To change the default number of tagged transactions allowed per-device,
  77  * add a line to the lilo.conf file like:
  78  * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
  79  * which will result in the first four devices on the first two
  80  * controllers being set to a tagged queue depth of 32.
  81  *
  82  * The tag_commands is an array of 16 to allow for wide and twin adapters.
  83  * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
  84  * for channel 1.
  85  */
  86 typedef struct {
  87         uint16_t tag_commands[16];      /* Allow for wide/twin adapters. */
  88 } adapter_tag_info_t;
  89
  90 /*
  91  * Modify this as you see fit for your system.
  92  *
  93  * 0                    tagged queuing disabled
  94  * 1 <= n <= 253        n == max tags ever dispatched.
  95  *
  96  * The driver will throttle the number of commands dispatched to a
  97  * device if it returns queue full.  For devices with a fixed maximum
  98  * queue depth, the driver will eventually determine this depth and
  99  * lock it in (a console message is printed to indicate that a lock
 100  * has occurred).  On some devices, queue full is returned for a temporary
 101  * resource shortage.  These devices will return queue full at varying
 102  * depths.  The driver will throttle back when the queue fulls occur and
 103  * attempt to slowly increase the depth over time as the device recovers
 104  * from the resource shortage.
 105  *
 106  * In this example, the first line will disable tagged queueing for all
 107  * the devices on the first probed aic79xx adapter.
 108  *
 109  * The second line enables tagged queueing with 4 commands/LUN for IDs
 110  * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 111  * driver to attempt to use up to 64 tags for ID 1.
 112  *
 113  * The third line is the same as the first line.
 114  *
 115  * The fourth line disables tagged queueing for devices 0 and 3.  It
 116  * enables tagged queueing for the other IDs, with 16 commands/LUN
 117  * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 118  * IDs 2, 5-7, and 9-15.
 119  */
 120
 121 /*
 122  * NOTE: The below structure is for reference only, the actual structure
 123  *       to modify in order to change things is just below this comment block.
 124 adapter_tag_info_t aic79xx_tag_info[] =
 125 {
 126         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 127         {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
 128         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 129         {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
 130 };
 131 */
 132
 133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
 134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
 135 #else
 136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
 137 #endif
 138
 139 #define AIC79XX_CONFIGED_TAG_COMMANDS {                                 \
 140         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 141         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 142         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 143         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 144         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 145         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 146         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 147         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE                \
 148 }
 149
 150 /*
 151  * By default, use the number of commands specified by
 152  * the users kernel configuration.
 153  */
 154 static adapter_tag_info_t aic79xx_tag_info[] =
 155 {
 156         {AIC79XX_CONFIGED_TAG_COMMANDS},
 157         {AIC79XX_CONFIGED_TAG_COMMANDS},
 158         {AIC79XX_CONFIGED_TAG_COMMANDS},
 159         {AIC79XX_CONFIGED_TAG_COMMANDS},
 160         {AIC79XX_CONFIGED_TAG_COMMANDS},
 161         {AIC79XX_CONFIGED_TAG_COMMANDS},
 162         {AIC79XX_CONFIGED_TAG_COMMANDS},
 163         {AIC79XX_CONFIGED_TAG_COMMANDS},
 164         {AIC79XX_CONFIGED_TAG_COMMANDS},
 165         {AIC79XX_CONFIGED_TAG_COMMANDS},
 166         {AIC79XX_CONFIGED_TAG_COMMANDS},
 167         {AIC79XX_CONFIGED_TAG_COMMANDS},
 168         {AIC79XX_CONFIGED_TAG_COMMANDS},
 169         {AIC79XX_CONFIGED_TAG_COMMANDS},
 170         {AIC79XX_CONFIGED_TAG_COMMANDS},
 171         {AIC79XX_CONFIGED_TAG_COMMANDS}
 172 };
 173
 174 /*
 175  * The I/O cell on the chip is very configurable in respect to its analog
 176  * characteristics.  Set the defaults here; they can be overriden with
 177  * the proper insmod parameters.
 178  */
 179 struct ahd_linux_iocell_opts
 180 {
 181         uint8_t precomp;
 182         uint8_t slewrate;
 183         uint8_t amplitude;
 184 };
 185 #define AIC79XX_DEFAULT_PRECOMP         0xFF
 186 #define AIC79XX_DEFAULT_SLEWRATE        0xFF
 187 #define AIC79XX_DEFAULT_AMPLITUDE       0xFF
 188 #define AIC79XX_DEFAULT_IOOPTS                  \
 189 {                                               \
 190         AIC79XX_DEFAULT_PRECOMP,                \
 191         AIC79XX_DEFAULT_SLEWRATE,               \
 192         AIC79XX_DEFAULT_AMPLITUDE               \
 193 }
 194 #define AIC79XX_PRECOMP_INDEX   0
 195 #define AIC79XX_SLEWRATE_INDEX  1
 196 #define AIC79XX_AMPLITUDE_INDEX 2
 197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
 198 {
 199         AIC79XX_DEFAULT_IOOPTS,
 200         AIC79XX_DEFAULT_IOOPTS,
 201         AIC79XX_DEFAULT_IOOPTS,
 202         AIC79XX_DEFAULT_IOOPTS,
 203         AIC79XX_DEFAULT_IOOPTS,
 204         AIC79XX_DEFAULT_IOOPTS,
 205         AIC79XX_DEFAULT_IOOPTS,
 206         AIC79XX_DEFAULT_IOOPTS,
 207         AIC79XX_DEFAULT_IOOPTS,
 208         AIC79XX_DEFAULT_IOOPTS,
 209         AIC79XX_DEFAULT_IOOPTS,
 210         AIC79XX_DEFAULT_IOOPTS,
 211         AIC79XX_DEFAULT_IOOPTS,
 212         AIC79XX_DEFAULT_IOOPTS,
 213         AIC79XX_DEFAULT_IOOPTS,
 214         AIC79XX_DEFAULT_IOOPTS
 215 };
 216
 217 /*
 218  * There should be a specific return value for this in scsi.h, but
 219  * it seems that most drivers ignore it.
 220  */
 221 #define DID_UNDERFLOW   DID_ERROR
 222
 223 void
 224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
 225 {
 226         printk("(scsi%d:%c:%d:%d): ",
 227                ahd->platform_data->host->host_no,
 228                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
 229                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
 230                scb != NULL ? SCB_GET_LUN(scb) : -1);
 231 }
 232
 233 /*
 234  * XXX - these options apply unilaterally to _all_ adapters
 235  *       cards in the system.  This should be fixed.  Exceptions to this
 236  *       rule are noted in the comments.
 237  */
 238
 239 /*
 240  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 241  * has no effect on any later resets that might occur due to things like
 242  * SCSI bus timeouts.
 243  */
 244 static uint32_t aic79xx_no_reset;
 245
 246 /*
 247  * Should we force EXTENDED translation on a controller.
 248  *     0 == Use whatever is in the SEEPROM or default to off
 249  *     1 == Use whatever is in the SEEPROM or default to on
 250  */
 251 static uint32_t aic79xx_extended;
 252
 253 /*
 254  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 255  * dubious at best.  To my knowledge, this option has never actually
 256  * solved a PCI parity problem, but on certain machines with broken PCI
 257  * chipset configurations, it can generate tons of false error messages.
 258  * It's included in the driver for completeness.
 259  *   0     = Shut off PCI parity check
 260  *   non-0 = Enable PCI parity check
 261  *
 262  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 263  * variable to -1 you would actually want to simply pass the variable
 264  * name without a number.  That will invert the 0 which will result in
 265  * -1.
 266  */
 267 static uint32_t aic79xx_pci_parity = ~0;
 268
 269 /*
 270  * There are lots of broken chipsets in the world.  Some of them will
 271  * violate the PCI spec when we issue byte sized memory writes to our
 272  * controller.  I/O mapped register access, if allowed by the given
 273  * platform, will work in almost all cases.
 274  */
 275 uint32_t aic79xx_allow_memio = ~0;
 276
 277 /*
 278  * So that we can set how long each device is given as a selection timeout.
 279  * The table of values goes like this:
 280  *   0 - 256ms
 281  *   1 - 128ms
 282  *   2 - 64ms
 283  *   3 - 32ms
 284  * We default to 256ms because some older devices need a longer time
 285  * to respond to initial selection.
 286  */
 287 static uint32_t aic79xx_seltime;
 288
 289 /*
 290  * Certain devices do not perform any aging on commands.  Should the
 291  * device be saturated by commands in one portion of the disk, it is
 292  * possible for transactions on far away sectors to never be serviced.
 293  * To handle these devices, we can periodically send an ordered tag to
 294  * force all outstanding transactions to be serviced prior to a new
 295  * transaction.
 296  */
 297 static uint32_t aic79xx_periodic_otag;
 298
 299 /* Some storage boxes are using an LSI chip which has a bug making it
 300  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 301  * storage boxes have been reported to be buggy:
 302  * EonStor 3U 16-Bay: U16U-G3A3
 303  * EonStor 2U 12-Bay: U12U-G3A3
 304  * SentinelRAID: 2500F R5 / R6
 305  * SentinelRAID: 2500F R1
 306  * SentinelRAID: 2500F/1500F
 307  * SentinelRAID: 150F
 308  *
 309  * To get around this LSI bug, you can set your board to 160 mode
 310  * or you can enable the SLOWCRC bit.
 311  */
 312 uint32_t aic79xx_slowcrc;
 313
 314 /*
 315  * Module information and settable options.
 316  */
 317 static char *aic79xx = NULL;
 318
 319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
 320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
 321 MODULE_LICENSE("Dual BSD/GPL");
 322 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
 323 module_param(aic79xx, charp, 0444);
 324 MODULE_PARM_DESC(aic79xx,
 325 "period-delimited options string:\n"
 326 "       verbose                 Enable verbose/diagnostic logging\n"
 327 "       allow_memio             Allow device registers to be memory mapped\n"
 328 "       debug                   Bitmask of debug values to enable\n"
 329 "       no_reset                Suppress initial bus resets\n"
 330 "       extended                Enable extended geometry on all controllers\n"
 331 "       periodic_otag           Send an ordered tagged transaction\n"
 332 "                               periodically to prevent tag starvation.\n"
 333 "                               This may be required by some older disk\n"
 334 "                               or drives/RAID arrays.\n"
 335 "       tag_info:<tag_str>      Set per-target tag depth\n"
 336 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
 337 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 338 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
 339 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 340 "       seltime:<int>           Selection Timeout:\n"
 341 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
 342 "       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"
 343 "\n"
 344 "       Sample /etc/modprobe.conf line:\n"
 345 "               Enable verbose logging\n"
 346 "               Set tag depth on Controller 2/Target 2 to 10 tags\n"
 347 "               Shorten the selection timeout to 128ms\n"
 348 "\n"
 349 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
 350 );
 351
 352 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 353                                          struct scsi_device *,
 354                                          struct scb *);
 355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 356                                          struct scsi_cmnd *cmd);
 357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 360                                      struct ahd_devinfo *devinfo);
 361 static void ahd_linux_device_queue_depth(struct scsi_device *);
 362 static int ahd_linux_run_command(struct ahd_softc*,
 363                                  struct ahd_linux_device *,
 364                                  struct scsi_cmnd *);
 365 static void ahd_linux_setup_tag_info_global(char *p);
 366 static int  aic79xx_setup(char *c);
 367 static void ahd_freeze_simq(struct ahd_softc *ahd);
 368 static void ahd_release_simq(struct ahd_softc *ahd);
 369
 370 static int ahd_linux_unit;
 371
 372
 373 /************************** OS Utility Wrappers *******************************/
 374 void ahd_delay(long);
 375 void
 376 ahd_delay(long usec)
 377 {
 378         /*
 379          * udelay on Linux can have problems for
 380          * multi-millisecond waits.  Wait at most
 381          * 1024us per call.
 382          */
 383         while (usec > 0) {
 384                 udelay(usec % 1024);
 385                 usec -= 1024;
 386         }
 387 }
 388
 389
 390 /***************************** Low Level I/O **********************************/
 391 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 393 void ahd_outw_atomic(struct ahd_softc * ahd,
 394                                      long port, uint16_t val);
 395 void ahd_outsb(struct ahd_softc * ahd, long port,
 396                                uint8_t *, int count);
 397 void ahd_insb(struct ahd_softc * ahd, long port,
 398                                uint8_t *, int count);
 399
 400 uint8_t
 401 ahd_inb(struct ahd_softc * ahd, long port)
 402 {
 403         uint8_t x;
 404
 405         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 406                 x = readb(ahd->bshs[0].maddr + port);
 407         } else {
 408                 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 409         }
 410         mb();
 411         return (x);
 412 }
 413
 414 #if 0 /* unused */
 415 static uint16_t
 416 ahd_inw_atomic(struct ahd_softc * ahd, long port)
 417 {
 418         uint8_t x;
 419
 420         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 421                 x = readw(ahd->bshs[0].maddr + port);
 422         } else {
 423                 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 424         }
 425         mb();
 426         return (x);
 427 }
 428 #endif
 429
 430 void
 431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
 432 {
 433         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 434                 writeb(val, ahd->bshs[0].maddr + port);
 435         } else {
 436                 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 437         }
 438         mb();
 439 }
 440
 441 void
 442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
 443 {
 444         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 445                 writew(val, ahd->bshs[0].maddr + port);
 446         } else {
 447                 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 448         }
 449         mb();
 450 }
 451
 452 void
 453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 454 {
 455         int i;
 456
 457         /*
 458          * There is probably a more efficient way to do this on Linux
 459          * but we don't use this for anything speed critical and this
 460          * should work.
 461          */
 462         for (i = 0; i < count; i++)
 463                 ahd_outb(ahd, port, *array++);
 464 }
 465
 466 void
 467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 468 {
 469         int i;
 470
 471         /*
 472          * There is probably a more efficient way to do this on Linux
 473          * but we don't use this for anything speed critical and this
 474          * should work.
 475          */
 476         for (i = 0; i < count; i++)
 477                 *array++ = ahd_inb(ahd, port);
 478 }
 479
 480 /******************************* PCI Routines *********************************/
 481 uint32_t
 482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
 483 {
 484         switch (width) {
 485         case 1:
 486         {
 487                 uint8_t retval;
 488
 489                 pci_read_config_byte(pci, reg, &retval);
 490                 return (retval);
 491         }
 492         case 2:
 493         {
 494                 uint16_t retval;
 495                 pci_read_config_word(pci, reg, &retval);
 496                 return (retval);
 497         }
 498         case 4:
 499         {
 500                 uint32_t retval;
 501                 pci_read_config_dword(pci, reg, &retval);
 502                 return (retval);
 503         }
 504         default:
 505                 panic("ahd_pci_read_config: Read size too big");
 506                 /* NOTREACHED */
 507                 return (0);
 508         }
 509 }
 510
 511 void
 512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
 513 {
 514         switch (width) {
 515         case 1:
 516                 pci_write_config_byte(pci, reg, value);
 517                 break;
 518         case 2:
 519                 pci_write_config_word(pci, reg, value);
 520                 break;
 521         case 4:
 522                 pci_write_config_dword(pci, reg, value);
 523                 break;
 524         default:
 525                 panic("ahd_pci_write_config: Write size too big");
 526                 /* NOTREACHED */
 527         }
 528 }
 529
 530 /****************************** Inlines ***************************************/
 531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 532
 533 static void
 534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 535 {
 536         struct scsi_cmnd *cmd;
 537
 538         cmd = scb->io_ctx;
 539         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 540         scsi_dma_unmap(cmd);
 541 }
 542
 543 /******************************** Macros **************************************/
 544 #define BUILD_SCSIID(ahd, cmd)                                          \
 545         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 546
 547 /*
 548  * Return a string describing the driver.
 549  */
 550 static const char *
 551 ahd_linux_info(struct Scsi_Host *host)
 552 {
 553         static char buffer[512];
 554         char    ahd_info[256];
 555         char   *bp;
 556         struct ahd_softc *ahd;
 557
 558         bp = &buffer[0];
 559         ahd = *(struct ahd_softc **)host->hostdata;
 560         memset(bp, 0, sizeof(buffer));
 561         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
 562                         "        <");
 563         strcat(bp, ahd->description);
 564         strcat(bp, ">\n"
 565                         "        ");
 566         ahd_controller_info(ahd, ahd_info);
 567         strcat(bp, ahd_info);
 568
 569         return (bp);
 570 }
 571
 572 /*
 573  * Queue an SCB to the controller.
 574  */
 575 static int
 576 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 577 {
 578         struct   ahd_softc *ahd;
 579         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 580         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 581
 582         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 583
 584         cmd->scsi_done = scsi_done;
 585         cmd->result = CAM_REQ_INPROG << 16;
 586         rtn = ahd_linux_run_command(ahd, dev, cmd);
 587
 588         return rtn;
 589 }
 590
 591 static struct scsi_target **
 592 ahd_linux_target_in_softc(struct scsi_target *starget)
 593 {
 594         struct  ahd_softc *ahd =
 595                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 596         unsigned int target_offset;
 597
 598         target_offset = starget->id;
 599         if (starget->channel != 0)
 600                 target_offset += 8;
 601
 602         return &ahd->platform_data->starget[target_offset];
 603 }
 604
 605 static int
 606 ahd_linux_target_alloc(struct scsi_target *starget)
 607 {
 608         struct  ahd_softc *ahd =
 609                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 610         struct seeprom_config *sc = ahd->seep_config;
 611         unsigned long flags;
 612         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 613         struct ahd_devinfo devinfo;
 614         struct ahd_initiator_tinfo *tinfo;
 615         struct ahd_tmode_tstate *tstate;
 616         char channel = starget->channel + 'A';
 617
 618         ahd_lock(ahd, &flags);
 619
 620         BUG_ON(*ahd_targp != NULL);
 621
 622         *ahd_targp = starget;
 623
 624         if (sc) {
 625                 int flags = sc->device_flags[starget->id];
 626
 627                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 628                                             starget->id, &tstate);
 629
 630                 if ((flags  & CFPACKETIZED) == 0) {
 631                         /* don't negotiate packetized (IU) transfers */
 632                         spi_max_iu(starget) = 0;
 633                 } else {
 634                         if ((ahd->features & AHD_RTI) == 0)
 635                                 spi_rti(starget) = 0;
 636                 }
 637
 638                 if ((flags & CFQAS) == 0)
 639                         spi_max_qas(starget) = 0;
 640
 641                 /* Transinfo values have been set to BIOS settings */
 642                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 643                 spi_min_period(starget) = tinfo->user.period;
 644                 spi_max_offset(starget) = tinfo->user.offset;
 645         }
 646
 647         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 648                                     starget->id, &tstate);
 649         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 650                             CAM_LUN_WILDCARD, channel,
 651                             ROLE_INITIATOR);
 652         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 653                          AHD_TRANS_GOAL, /*paused*/FALSE);
 654         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 655                       AHD_TRANS_GOAL, /*paused*/FALSE);
 656         ahd_unlock(ahd, &flags);
 657
 658         return 0;
 659 }
 660
 661 static void
 662 ahd_linux_target_destroy(struct scsi_target *starget)
 663 {
 664         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 665
 666         *ahd_targp = NULL;
 667 }
 668
 669 static int
 670 ahd_linux_slave_alloc(struct scsi_device *sdev)
 671 {
 672         struct  ahd_softc *ahd =
 673                 *((struct ahd_softc **)sdev->host->hostdata);
 674         struct ahd_linux_device *dev;
 675
 676         if (bootverbose)
 677                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 678
 679         dev = scsi_transport_device_data(sdev);
 680         memset(dev, 0, sizeof(*dev));
 681
 682         /*
 683          * We start out life using untagged
 684          * transactions of which we allow one.
 685          */
 686         dev->openings = 1;
 687
 688         /*
 689          * Set maxtags to 0.  This will be changed if we
 690          * later determine that we are dealing with
 691          * a tagged queuing capable device.
 692          */
 693         dev->maxtags = 0;
 694
 695         return (0);
 696 }
 697
 698 static int
 699 ahd_linux_slave_configure(struct scsi_device *sdev)
 700 {
 701         struct  ahd_softc *ahd;
 702
 703         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 704         if (bootverbose)
 705                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 706
 707         ahd_linux_device_queue_depth(sdev);
 708
 709         /* Initial Domain Validation */
 710         if (!spi_initial_dv(sdev->sdev_target))
 711                 spi_dv_device(sdev);
 712
 713         return 0;
 714 }
 715
 716 #if defined(__i386__)
 717 /*
 718  * Return the disk geometry for the given SCSI device.
 719  */
 720 static int
 721 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 722                     sector_t capacity, int geom[])
 723 {
 724         uint8_t *bh;
 725         int      heads;
 726         int      sectors;
 727         int      cylinders;
 728         int      ret;
 729         int      extended;
 730         struct   ahd_softc *ahd;
 731
 732         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 733
 734         bh = scsi_bios_ptable(bdev);
 735         if (bh) {
 736                 ret = scsi_partsize(bh, capacity,
 737                                     &geom[2], &geom[0], &geom[1]);
 738                 kfree(bh);
 739                 if (ret != -1)
 740                         return (ret);
 741         }
 742         heads = 64;
 743         sectors = 32;
 744         cylinders = aic_sector_div(capacity, heads, sectors);
 745
 746         if (aic79xx_extended != 0)
 747                 extended = 1;
 748         else
 749                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 750         if (extended && cylinders >= 1024) {
 751                 heads = 255;
 752                 sectors = 63;
 753                 cylinders = aic_sector_div(capacity, heads, sectors);
 754         }
 755         geom[0] = heads;
 756         geom[1] = sectors;
 757         geom[2] = cylinders;
 758         return (0);
 759 }
 760 #endif
 761
 762 /*
 763  * Abort the current SCSI command(s).
 764  */
 765 static int
 766 ahd_linux_abort(struct scsi_cmnd *cmd)
 767 {
 768         int error;
 769
 770         error = ahd_linux_queue_abort_cmd(cmd);
 771
 772         return error;
 773 }
 774
 775 /*
 776  * Attempt to send a target reset message to the device that timed out.
 777  */
 778 static int
 779 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 780 {
 781         struct ahd_softc *ahd;
 782         struct ahd_linux_device *dev;
 783         struct scb *reset_scb;
 784         u_int  cdb_byte;
 785         int    retval = SUCCESS;
 786         int    paused;
 787         int    wait;
 788         struct  ahd_initiator_tinfo *tinfo;
 789         struct  ahd_tmode_tstate *tstate;
 790         unsigned long flags;
 791         DECLARE_COMPLETION_ONSTACK(done);
 792
 793         reset_scb = NULL;
 794         paused = FALSE;
 795         wait = FALSE;
 796         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 797
 798         scmd_printk(KERN_INFO, cmd,
 799                     "Attempting to queue a TARGET RESET message:");
 800
 801         printf("CDB:");
 802         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 803                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 804         printf("\n");
 805
 806         /*
 807          * Determine if we currently own this command.
 808          */
 809         dev = scsi_transport_device_data(cmd->device);
 810
 811         if (dev == NULL) {
 812                 /*
 813                  * No target device for this command exists,
 814                  * so we must not still own the command.
 815                  */
 816                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 817                 return SUCCESS;
 818         }
 819
 820         /*
 821          * Generate us a new SCB
 822          */
 823         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 824         if (!reset_scb) {
 825                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 826                 return FAILED;
 827         }
 828
 829         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 830                                     cmd->device->id, &tstate);
 831         reset_scb->io_ctx = cmd;
 832         reset_scb->platform_data->dev = dev;
 833         reset_scb->sg_count = 0;
 834         ahd_set_residual(reset_scb, 0);
 835         ahd_set_sense_residual(reset_scb, 0);
 836         reset_scb->platform_data->xfer_len = 0;
 837         reset_scb->hscb->control = 0;
 838         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 839         reset_scb->hscb->lun = cmd->device->lun;
 840         reset_scb->hscb->cdb_len = 0;
 841         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 842         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 843         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 844                 reset_scb->flags |= SCB_PACKETIZED;
 845         } else {
 846                 reset_scb->hscb->control |= MK_MESSAGE;
 847         }
 848         dev->openings--;
 849         dev->active++;
 850         dev->commands_issued++;
 851
 852         ahd_lock(ahd, &flags);
 853
 854         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 855         ahd_queue_scb(ahd, reset_scb);
 856
 857         ahd->platform_data->eh_done = &done;
 858         ahd_unlock(ahd, &flags);
 859
 860         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 861         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 862                 ahd_lock(ahd, &flags);
 863                 ahd->platform_data->eh_done = NULL;
 864                 ahd_unlock(ahd, &flags);
 865                 printf("%s: Device reset timer expired (active %d)\n",
 866                        ahd_name(ahd), dev->active);
 867                 retval = FAILED;
 868         }
 869         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 870
 871         return (retval);
 872 }
 873
 874 /*
 875  * Reset the SCSI bus.
 876  */
 877 static int
 878 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 879 {
 880         struct ahd_softc *ahd;
 881         int    found;
 882         unsigned long flags;
 883
 884         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 885 #ifdef AHD_DEBUG
 886         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 887                 printf("%s: Bus reset called for cmd %p\n",
 888                        ahd_name(ahd), cmd);
 889 #endif
 890         ahd_lock(ahd, &flags);
 891
 892         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 893                                   /*initiate reset*/TRUE);
 894         ahd_unlock(ahd, &flags);
 895
 896         if (bootverbose)
 897                 printf("%s: SCSI bus reset delivered. "
 898                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 899
 900         return (SUCCESS);
 901 }
 902
 903 struct scsi_host_template aic79xx_driver_template = {
 904         .module                 = THIS_MODULE,
 905         .name                   = "aic79xx",
 906         .proc_name              = "aic79xx",
 907         .proc_info              = ahd_linux_proc_info,
 908         .info                   = ahd_linux_info,
 909         .queuecommand           = ahd_linux_queue,
 910         .eh_abort_handler       = ahd_linux_abort,
 911         .eh_device_reset_handler = ahd_linux_dev_reset,
 912         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 913 #if defined(__i386__)
 914         .bios_param             = ahd_linux_biosparam,
 915 #endif
 916         .can_queue              = AHD_MAX_QUEUE,
 917         .this_id                = -1,
 918         .max_sectors            = 8192,
 919         .cmd_per_lun            = 2,
 920         .use_clustering         = ENABLE_CLUSTERING,
 921         .slave_alloc            = ahd_linux_slave_alloc,
 922         .slave_configure        = ahd_linux_slave_configure,
 923         .target_alloc           = ahd_linux_target_alloc,
 924         .target_destroy         = ahd_linux_target_destroy,
 925 };
 926
 927 /******************************** Bus DMA *************************************/
 928 int
 929 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 930                    bus_size_t alignment, bus_size_t boundary,
 931                    dma_addr_t lowaddr, dma_addr_t highaddr,
 932                    bus_dma_filter_t *filter, void *filterarg,
 933                    bus_size_t maxsize, int nsegments,
 934                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 935 {
 936         bus_dma_tag_t dmat;
 937
 938         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 939         if (dmat == NULL)
 940                 return (ENOMEM);
 941
 942         /*
 943          * Linux is very simplistic about DMA memory.  For now don't
 944          * maintain all specification information.  Once Linux supplies
 945          * better facilities for doing these operations, or the
 946          * needs of this particular driver change, we might need to do
 947          * more here.
 948          */
 949         dmat->alignment = alignment;
 950         dmat->boundary = boundary;
 951         dmat->maxsize = maxsize;
 952         *ret_tag = dmat;
 953         return (0);
 954 }
 955
 956 void
 957 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 958 {
 959         free(dmat, M_DEVBUF);
 960 }
 961
 962 int
 963 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 964                  int flags, bus_dmamap_t *mapp)
 965 {
 966         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 967                                       dmat->maxsize, mapp);
 968         if (*vaddr == NULL)
 969                 return (ENOMEM);
 970         return(0);
 971 }
 972
 973 void
 974 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 975                 void* vaddr, bus_dmamap_t map)
 976 {
 977         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 978                             vaddr, map);
 979 }
 980
 981 int
 982 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 983                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 984                 void *cb_arg, int flags)
 985 {
 986         /*
 987          * Assume for now that this will only be used during
 988          * initialization and not for per-transaction buffer mapping.
 989          */
 990         bus_dma_segment_t stack_sg;
 991
 992         stack_sg.ds_addr = map;
 993         stack_sg.ds_len = dmat->maxsize;
 994         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 995         return (0);
 996 }
 997
 998 void
 999 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1000 {
1001 }
1002
1003 int
1004 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1005 {
1006         /* Nothing to do */
1007         return (0);
1008 }
1009
1010 /********************* Platform Dependent Functions ***************************/
1011 static void
1012 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1013 {
1014
1015         if ((instance >= 0)
1016          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1017                 uint8_t *iocell_info;
1018
1019                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1020                 iocell_info[index] = value & 0xFFFF;
1021                 if (bootverbose)
1022                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
1023         }
1024 }
1025
1026 static void
1027 ahd_linux_setup_tag_info_global(char *p)
1028 {
1029         int tags, i, j;
1030
1031         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1032         printf("Setting Global Tags= %d\n", tags);
1033
1034         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1035                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1036                         aic79xx_tag_info[i].tag_commands[j] = tags;
1037                 }
1038         }
1039 }
1040
1041 static void
1042 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1043 {
1044
1045         if ((instance >= 0) && (targ >= 0)
1046          && (instance < ARRAY_SIZE(aic79xx_tag_info))
1047          && (targ < AHD_NUM_TARGETS)) {
1048                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1049                 if (bootverbose)
1050                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1051         }
1052 }
1053
1054 static char *
1055 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1056                        void (*callback)(u_long, int, int, int32_t),
1057                        u_long callback_arg)
1058 {
1059         char    *tok_end;
1060         char    *tok_end2;
1061         int      i;
1062         int      instance;
1063         int      targ;
1064         int      done;
1065         char     tok_list[] = {'.', ',', '{', '}', '\0'};
1066
1067         /* All options use a ':' name/arg separator */
1068         if (*opt_arg != ':')
1069                 return (opt_arg);
1070         opt_arg++;
1071         instance = -1;
1072         targ = -1;
1073         done = FALSE;
1074         /*
1075          * Restore separator that may be in
1076          * the middle of our option argument.
1077          */
1078         tok_end = strchr(opt_arg, '\0');
1079         if (tok_end < end)
1080                 *tok_end = ',';
1081         while (!done) {
1082                 switch (*opt_arg) {
1083                 case '{':
1084                         if (instance == -1) {
1085                                 instance = 0;
1086                         } else {
1087                                 if (depth > 1) {
1088                                         if (targ == -1)
1089                                                 targ = 0;
1090                                 } else {
1091                                         printf("Malformed Option %s\n",
1092                                                opt_name);
1093                                         done = TRUE;
1094                                 }
1095                         }
1096                         opt_arg++;
1097                         break;
1098                 case '}':
1099                         if (targ != -1)
1100                                 targ = -1;
1101                         else if (instance != -1)
1102                                 instance = -1;
1103                         opt_arg++;
1104                         break;
1105                 case ',':
1106                 case '.':
1107                         if (instance == -1)
1108                                 done = TRUE;
1109                         else if (targ >= 0)
1110                                 targ++;
1111                         else if (instance >= 0)
1112                                 instance++;
1113                         opt_arg++;
1114                         break;
1115                 case '\0':
1116                         done = TRUE;
1117                         break;
1118                 default:
1119                         tok_end = end;
1120                         for (i = 0; tok_list[i]; i++) {
1121                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1122                                 if ((tok_end2) && (tok_end2 < tok_end))
1123                                         tok_end = tok_end2;
1124                         }
1125                         callback(callback_arg, instance, targ,
1126                                  simple_strtol(opt_arg, NULL, 0));
1127                         opt_arg = tok_end;
1128                         break;
1129                 }
1130         }
1131         return (opt_arg);
1132 }
1133
1134 /*
1135  * Handle Linux boot parameters. This routine allows for assigning a value
1136  * to a parameter with a ':' between the parameter and the value.
1137  * ie. aic79xx=stpwlev:1,extended
1138  */
1139 static int
1140 aic79xx_setup(char *s)
1141 {
1142         int     i, n;
1143         char   *p;
1144         char   *end;
1145
1146         static const struct {
1147                 const char *name;
1148                 uint32_t *flag;
1149         } options[] = {
1150                 { "extended", &aic79xx_extended },
1151                 { "no_reset", &aic79xx_no_reset },
1152                 { "verbose", &aic79xx_verbose },
1153                 { "allow_memio", &aic79xx_allow_memio},
1154 #ifdef AHD_DEBUG
1155                 { "debug", &ahd_debug },
1156 #endif
1157                 { "periodic_otag", &aic79xx_periodic_otag },
1158                 { "pci_parity", &aic79xx_pci_parity },
1159                 { "seltime", &aic79xx_seltime },
1160                 { "tag_info", NULL },
1161                 { "global_tag_depth", NULL},
1162                 { "slewrate", NULL },
1163                 { "precomp", NULL },
1164                 { "amplitude", NULL },
1165                 { "slowcrc", &aic79xx_slowcrc },
1166         };
1167
1168         end = strchr(s, '\0');
1169
1170         /*
1171          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1172          * will never be 0 in this case.
1173          */
1174         n = 0;
1175
1176         while ((p = strsep(&s, ",.")) != NULL) {
1177                 if (*p == '\0')
1178                         continue;
1179                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1180
1181                         n = strlen(options[i].name);
1182                         if (strncmp(options[i].name, p, n) == 0)
1183                                 break;
1184                 }
1185                 if (i == ARRAY_SIZE(options))
1186                         continue;
1187
1188                 if (strncmp(p, "global_tag_depth", n) == 0) {
1189                         ahd_linux_setup_tag_info_global(p + n);
1190                 } else if (strncmp(p, "tag_info", n) == 0) {
1191                         s = ahd_parse_brace_option("tag_info", p + n, end,
1192                             2, ahd_linux_setup_tag_info, 0);
1193                 } else if (strncmp(p, "slewrate", n) == 0) {
1194                         s = ahd_parse_brace_option("slewrate",
1195                             p + n, end, 1, ahd_linux_setup_iocell_info,
1196                             AIC79XX_SLEWRATE_INDEX);
1197                 } else if (strncmp(p, "precomp", n) == 0) {
1198                         s = ahd_parse_brace_option("precomp",
1199                             p + n, end, 1, ahd_linux_setup_iocell_info,
1200                             AIC79XX_PRECOMP_INDEX);
1201                 } else if (strncmp(p, "amplitude", n) == 0) {
1202                         s = ahd_parse_brace_option("amplitude",
1203                             p + n, end, 1, ahd_linux_setup_iocell_info,
1204                             AIC79XX_AMPLITUDE_INDEX);
1205                 } else if (p[n] == ':') {
1206                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1207                 } else if (!strncmp(p, "verbose", n)) {
1208                         *(options[i].flag) = 1;
1209                 } else {
1210                         *(options[i].flag) ^= 0xFFFFFFFF;
1211                 }
1212         }
1213         return 1;
1214 }
1215
1216 __setup("aic79xx=", aic79xx_setup);
1217
1218 uint32_t aic79xx_verbose;
1219
1220 int
1221 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1222 {
1223         char    buf[80];
1224         struct  Scsi_Host *host;
1225         char    *new_name;
1226         u_long  s;
1227         int     retval;
1228
1229         template->name = ahd->description;
1230         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1231         if (host == NULL)
1232                 return (ENOMEM);
1233
1234         *((struct ahd_softc **)host->hostdata) = ahd;
1235         ahd->platform_data->host = host;
1236         host->can_queue = AHD_MAX_QUEUE;
1237         host->cmd_per_lun = 2;
1238         host->sg_tablesize = AHD_NSEG;
1239         host->this_id = ahd->our_id;
1240         host->irq = ahd->platform_data->irq;
1241         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1242         host->max_lun = AHD_NUM_LUNS;
1243         host->max_channel = 0;
1244         host->sg_tablesize = AHD_NSEG;
1245         ahd_lock(ahd, &s);
1246         ahd_set_unit(ahd, ahd_linux_unit++);
1247         ahd_unlock(ahd, &s);
1248         sprintf(buf, "scsi%d", host->host_no);
1249         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1250         if (new_name != NULL) {
1251                 strcpy(new_name, buf);
1252                 ahd_set_name(ahd, new_name);
1253         }
1254         host->unique_id = ahd->unit;
1255         ahd_linux_initialize_scsi_bus(ahd);
1256         ahd_intr_enable(ahd, TRUE);
1257
1258         host->transportt = ahd_linux_transport_template;
1259
1260         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1261         if (retval) {
1262                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1263                 scsi_host_put(host);
1264                 return retval;
1265         }
1266
1267         scsi_scan_host(host);
1268         return 0;
1269 }
1270
1271 /*
1272  * Place the SCSI bus into a known state by either resetting it,
1273  * or forcing transfer negotiations on the next command to any
1274  * target.
1275  */
1276 static void
1277 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1278 {
1279         u_int target_id;
1280         u_int numtarg;
1281         unsigned long s;
1282
1283         target_id = 0;
1284         numtarg = 0;
1285
1286         if (aic79xx_no_reset != 0)
1287                 ahd->flags &= ~AHD_RESET_BUS_A;
1288
1289         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1290                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1291         else
1292                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1293
1294         ahd_lock(ahd, &s);
1295
1296         /*
1297          * Force negotiation to async for all targets that
1298          * will not see an initial bus reset.
1299          */
1300         for (; target_id < numtarg; target_id++) {
1301                 struct ahd_devinfo devinfo;
1302                 struct ahd_initiator_tinfo *tinfo;
1303                 struct ahd_tmode_tstate *tstate;
1304
1305                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1306                                             target_id, &tstate);
1307                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1308                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1309                 ahd_update_neg_request(ahd, &devinfo, tstate,
1310                                        tinfo, AHD_NEG_ALWAYS);
1311         }
1312         ahd_unlock(ahd, &s);
1313         /* Give the bus some time to recover */
1314         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1315                 ahd_freeze_simq(ahd);
1316                 msleep(AIC79XX_RESET_DELAY);
1317                 ahd_release_simq(ahd);
1318         }
1319 }
1320
1321 int
1322 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1323 {
1324         ahd->platform_data =
1325             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1326         if (ahd->platform_data == NULL)
1327                 return (ENOMEM);
1328         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1329         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1330         ahd_lockinit(ahd);
1331         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1332         return (0);
1333 }
1334
1335 void
1336 ahd_platform_free(struct ahd_softc *ahd)
1337 {
1338         struct scsi_target *starget;
1339         int i;
1340
1341         if (ahd->platform_data != NULL) {
1342                 /* destroy all of the device and target objects */
1343                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1344                         starget = ahd->platform_data->starget[i];
1345                         if (starget != NULL) {
1346                                 ahd->platform_data->starget[i] = NULL;
1347                         }
1348                 }
1349
1350                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1351                         free_irq(ahd->platform_data->irq, ahd);
1352                 if (ahd->tags[0] == BUS_SPACE_PIO
1353                  && ahd->bshs[0].ioport != 0)
1354                         release_region(ahd->bshs[0].ioport, 256);
1355                 if (ahd->tags[1] == BUS_SPACE_PIO
1356                  && ahd->bshs[1].ioport != 0)
1357                         release_region(ahd->bshs[1].ioport, 256);
1358                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1359                  && ahd->bshs[0].maddr != NULL) {
1360                         iounmap(ahd->bshs[0].maddr);
1361                         release_mem_region(ahd->platform_data->mem_busaddr,
1362                                            0x1000);
1363                 }
1364                 if (ahd->platform_data->host)
1365                         scsi_host_put(ahd->platform_data->host);
1366
1367                 free(ahd->platform_data, M_DEVBUF);
1368         }
1369 }
1370
1371 void
1372 ahd_platform_init(struct ahd_softc *ahd)
1373 {
1374         /*
1375          * Lookup and commit any modified IO Cell options.
1376          */
1377         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1378                 const struct ahd_linux_iocell_opts *iocell_opts;
1379
1380                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1381                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1382                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1383                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1384                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1385                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1386                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1387         }
1388
1389 }
1390
1391 void
1392 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1393 {
1394         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1395                                 SCB_GET_CHANNEL(ahd, scb),
1396                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1397                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1398 }
1399
1400 void
1401 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1402                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1403 {
1404         struct ahd_linux_device *dev;
1405         int was_queuing;
1406         int now_queuing;
1407
1408         if (sdev == NULL)
1409                 return;
1410
1411         dev = scsi_transport_device_data(sdev);
1412
1413         if (dev == NULL)
1414                 return;
1415         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1416         switch (alg) {
1417         default:
1418         case AHD_QUEUE_NONE:
1419                 now_queuing = 0;
1420                 break;
1421         case AHD_QUEUE_BASIC:
1422                 now_queuing = AHD_DEV_Q_BASIC;
1423                 break;
1424         case AHD_QUEUE_TAGGED:
1425                 now_queuing = AHD_DEV_Q_TAGGED;
1426                 break;
1427         }
1428         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1429          && (was_queuing != now_queuing)
1430          && (dev->active != 0)) {
1431                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1432                 dev->qfrozen++;
1433         }
1434
1435         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1436         if (now_queuing) {
1437                 u_int usertags;
1438
1439                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1440                 if (!was_queuing) {
1441                         /*
1442                          * Start out agressively and allow our
1443                          * dynamic queue depth algorithm to take
1444                          * care of the rest.
1445                          */
1446                         dev->maxtags = usertags;
1447                         dev->openings = dev->maxtags - dev->active;
1448                 }
1449                 if (dev->maxtags == 0) {
1450                         /*
1451                          * Queueing is disabled by the user.
1452                          */
1453                         dev->openings = 1;
1454                 } else if (alg == AHD_QUEUE_TAGGED) {
1455                         dev->flags |= AHD_DEV_Q_TAGGED;
1456                         if (aic79xx_periodic_otag != 0)
1457                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1458                 } else
1459                         dev->flags |= AHD_DEV_Q_BASIC;
1460         } else {
1461                 /* We can only have one opening. */
1462                 dev->maxtags = 0;
1463                 dev->openings =  1 - dev->active;
1464         }
1465
1466         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1467         case AHD_DEV_Q_BASIC:
1468                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1469                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1470                 break;
1471         case AHD_DEV_Q_TAGGED:
1472                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1473                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1474                 break;
1475         default:
1476                 /*
1477                  * We allow the OS to queue 2 untagged transactions to
1478                  * us at any time even though we can only execute them
1479                  * serially on the controller/device.  This should
1480                  * remove some latency.
1481                  */
1482                 scsi_deactivate_tcq(sdev, 1);
1483                 break;
1484         }
1485 }
1486
1487 int
1488 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1489                         int lun, u_int tag, role_t role, uint32_t status)
1490 {
1491         return 0;
1492 }
1493
1494 static u_int
1495 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1496 {
1497         static int warned_user;
1498         u_int tags;
1499
1500         tags = 0;
1501         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1502                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1503
1504                         if (warned_user == 0) {
1505                                 printf(KERN_WARNING
1506 "aic79xx: WARNING: Insufficient tag_info instances\n"
1507 "aic79xx: for installed controllers.  Using defaults\n"
1508 "aic79xx: Please update the aic79xx_tag_info array in\n"
1509 "aic79xx: the aic79xx_osm.c source file.\n");
1510                                 warned_user++;
1511                         }
1512                         tags = AHD_MAX_QUEUE;
1513                 } else {
1514                         adapter_tag_info_t *tag_info;
1515
1516                         tag_info = &aic79xx_tag_info[ahd->unit];
1517                         tags = tag_info->tag_commands[devinfo->target_offset];
1518                         if (tags > AHD_MAX_QUEUE)
1519                                 tags = AHD_MAX_QUEUE;
1520                 }
1521         }
1522         return (tags);
1523 }
1524
1525 /*
1526  * Determines the queue depth for a given device.
1527  */
1528 static void
1529 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1530 {
1531         struct  ahd_devinfo devinfo;
1532         u_int   tags;
1533         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1534
1535         ahd_compile_devinfo(&devinfo,
1536                             ahd->our_id,
1537                             sdev->sdev_target->id, sdev->lun,
1538                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1539                             ROLE_INITIATOR);
1540         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1541         if (tags != 0 && sdev->tagged_supported != 0) {
1542
1543                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1544                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1545                                devinfo.lun, AC_TRANSFER_NEG);
1546                 ahd_print_devinfo(ahd, &devinfo);
1547                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1548         } else {
1549                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1550                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1551                                devinfo.lun, AC_TRANSFER_NEG);
1552         }
1553 }
1554
1555 static int
1556 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1557                       struct scsi_cmnd *cmd)
1558 {
1559         struct   scb *scb;
1560         struct   hardware_scb *hscb;
1561         struct   ahd_initiator_tinfo *tinfo;
1562         struct   ahd_tmode_tstate *tstate;
1563         u_int    col_idx;
1564         uint16_t mask;
1565         unsigned long flags;
1566         int nseg;
1567
1568         nseg = scsi_dma_map(cmd);
1569         if (nseg < 0)
1570                 return SCSI_MLQUEUE_HOST_BUSY;
1571
1572         ahd_lock(ahd, &flags);
1573
1574         /*
1575          * Get an scb to use.
1576          */
1577         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1578                                     cmd->device->id, &tstate);
1579         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1580          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1581                 col_idx = AHD_NEVER_COL_IDX;
1582         } else {
1583                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1584                                             cmd->device->lun);
1585         }
1586         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1587                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1588                 ahd_unlock(ahd, &flags);
1589                 scsi_dma_unmap(cmd);
1590                 return SCSI_MLQUEUE_HOST_BUSY;
1591         }
1592
1593         scb->io_ctx = cmd;
1594         scb->platform_data->dev = dev;
1595         hscb = scb->hscb;
1596         cmd->host_scribble = (char *)scb;
1597
1598         /*
1599          * Fill out basics of the HSCB.
1600          */
1601         hscb->control = 0;
1602         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1603         hscb->lun = cmd->device->lun;
1604         scb->hscb->task_management = 0;
1605         mask = SCB_GET_TARGET_MASK(ahd, scb);
1606
1607         if ((ahd->user_discenable & mask) != 0)
1608                 hscb->control |= DISCENB;
1609
1610         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1611                 scb->flags |= SCB_PACKETIZED;
1612
1613         if ((tstate->auto_negotiate & mask) != 0) {
1614                 scb->flags |= SCB_AUTO_NEGOTIATE;
1615                 scb->hscb->control |= MK_MESSAGE;
1616         }
1617
1618         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1619                 int     msg_bytes;
1620                 uint8_t tag_msgs[2];
1621
1622                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1623                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1624                         hscb->control |= tag_msgs[0];
1625                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1626                                 dev->commands_since_idle_or_otag = 0;
1627                 } else
1628                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1629                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1630                         hscb->control |= MSG_ORDERED_TASK;
1631                         dev->commands_since_idle_or_otag = 0;
1632                 } else {
1633                         hscb->control |= MSG_SIMPLE_TASK;
1634                 }
1635         }
1636
1637         hscb->cdb_len = cmd->cmd_len;
1638         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1639
1640         scb->platform_data->xfer_len = 0;
1641         ahd_set_residual(scb, 0);
1642         ahd_set_sense_residual(scb, 0);
1643         scb->sg_count = 0;
1644
1645         if (nseg > 0) {
1646                 void *sg = scb->sg_list;
1647                 struct scatterlist *cur_seg;
1648                 int i;
1649
1650                 scb->platform_data->xfer_len = 0;
1651
1652                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1653                         dma_addr_t addr;
1654                         bus_size_t len;
1655
1656                         addr = sg_dma_address(cur_seg);
1657                         len = sg_dma_len(cur_seg);
1658                         scb->platform_data->xfer_len += len;
1659                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1660                                           i == (nseg - 1));
1661                 }
1662         }
1663
1664         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1665         dev->openings--;
1666         dev->active++;
1667         dev->commands_issued++;
1668
1669         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1670                 dev->commands_since_idle_or_otag++;
1671         scb->flags |= SCB_ACTIVE;
1672         ahd_queue_scb(ahd, scb);
1673
1674         ahd_unlock(ahd, &flags);
1675
1676         return 0;
1677 }
1678
1679 /*
1680  * SCSI controller interrupt handler.
1681  */
1682 irqreturn_t
1683 ahd_linux_isr(int irq, void *dev_id)
1684 {
1685         struct  ahd_softc *ahd;
1686         u_long  flags;
1687         int     ours;
1688
1689         ahd = (struct ahd_softc *) dev_id;
1690         ahd_lock(ahd, &flags);
1691         ours = ahd_intr(ahd);
1692         ahd_unlock(ahd, &flags);
1693         return IRQ_RETVAL(ours);
1694 }
1695
1696 void
1697 ahd_send_async(struct ahd_softc *ahd, char channel,
1698                u_int target, u_int lun, ac_code code)
1699 {
1700         switch (code) {
1701         case AC_TRANSFER_NEG:
1702         {
1703                 char    buf[80];
1704                 struct  scsi_target *starget;
1705                 struct  info_str info;
1706                 struct  ahd_initiator_tinfo *tinfo;
1707                 struct  ahd_tmode_tstate *tstate;
1708                 unsigned int target_ppr_options;
1709
1710                 BUG_ON(target == CAM_TARGET_WILDCARD);
1711
1712                 info.buffer = buf;
1713                 info.length = sizeof(buf);
1714                 info.offset = 0;
1715                 info.pos = 0;
1716                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1717                                             target, &tstate);
1718
1719                 /*
1720                  * Don't bother reporting results while
1721                  * negotiations are still pending.
1722                  */
1723                 if (tinfo->curr.period != tinfo->goal.period
1724                  || tinfo->curr.width != tinfo->goal.width
1725                  || tinfo->curr.offset != tinfo->goal.offset
1726                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1727                         if (bootverbose == 0)
1728                                 break;
1729
1730                 /*
1731                  * Don't bother reporting results that
1732                  * are identical to those last reported.
1733                  */
1734                 starget = ahd->platform_data->starget[target];
1735                 if (starget == NULL)
1736                         break;
1737
1738                 target_ppr_options =
1739                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1740                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1741                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1742                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1743                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1744                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1745                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1746                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1747
1748                 if (tinfo->curr.period == spi_period(starget)
1749                     && tinfo->curr.width == spi_width(starget)
1750                     && tinfo->curr.offset == spi_offset(starget)
1751                  && tinfo->curr.ppr_options == target_ppr_options)
1752                         if (bootverbose == 0)
1753                                 break;
1754
1755                 spi_period(starget) = tinfo->curr.period;
1756                 spi_width(starget) = tinfo->curr.width;
1757                 spi_offset(starget) = tinfo->curr.offset;
1758                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1759                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1760                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1761                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1762                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1763                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1764                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1765                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1766                 spi_display_xfer_agreement(starget);
1767                 break;
1768         }
1769         case AC_SENT_BDR:
1770         {
1771                 WARN_ON(lun != CAM_LUN_WILDCARD);
1772                 scsi_report_device_reset(ahd->platform_data->host,
1773                                          channel - 'A', target);
1774                 break;
1775         }
1776         case AC_BUS_RESET:
1777                 if (ahd->platform_data->host != NULL) {
1778                         scsi_report_bus_reset(ahd->platform_data->host,
1779                                               channel - 'A');
1780                 }
1781                 break;
1782         default:
1783                 panic("ahd_send_async: Unexpected async event");
1784         }
1785 }
1786
1787 /*
1788  * Calls the higher level scsi done function and frees the scb.
1789  */
1790 void
1791 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1792 {
1793         struct scsi_cmnd *cmd;
1794         struct    ahd_linux_device *dev;
1795
1796         if ((scb->flags & SCB_ACTIVE) == 0) {
1797                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1798                 ahd_dump_card_state(ahd);
1799                 panic("Stopping for safety");
1800         }
1801         LIST_REMOVE(scb, pending_links);
1802         cmd = scb->io_ctx;
1803         dev = scb->platform_data->dev;
1804         dev->active--;
1805         dev->openings++;
1806         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1807                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1808                 dev->qfrozen--;
1809         }
1810         ahd_linux_unmap_scb(ahd, scb);
1811
1812         /*
1813          * Guard against stale sense data.
1814          * The Linux mid-layer assumes that sense
1815          * was retrieved anytime the first byte of
1816          * the sense buffer looks "sane".
1817          */
1818         cmd->sense_buffer[0] = 0;
1819         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1820                 uint32_t amount_xferred;
1821
1822                 amount_xferred =
1823                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1824                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1825 #ifdef AHD_DEBUG
1826                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1827                                 ahd_print_path(ahd, scb);
1828                                 printf("Set CAM_UNCOR_PARITY\n");
1829                         }
1830 #endif
1831                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1832 #ifdef AHD_REPORT_UNDERFLOWS
1833                 /*
1834                  * This code is disabled by default as some
1835                  * clients of the SCSI system do not properly
1836                  * initialize the underflow parameter.  This
1837                  * results in spurious termination of commands
1838                  * that complete as expected (e.g. underflow is
1839                  * allowed as command can return variable amounts
1840                  * of data.
1841                  */
1842                 } else if (amount_xferred < scb->io_ctx->underflow) {
1843                         u_int i;
1844
1845                         ahd_print_path(ahd, scb);
1846                         printf("CDB:");
1847                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1848                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1849                         printf("\n");
1850                         ahd_print_path(ahd, scb);
1851                         printf("Saw underflow (%ld of %ld bytes). "
1852                                "Treated as error\n",
1853                                 ahd_get_residual(scb),
1854                                 ahd_get_transfer_length(scb));
1855                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1856 #endif
1857                 } else {
1858                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1859                 }
1860         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1861                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1862         }
1863
1864         if (dev->openings == 1
1865          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1866          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1867                 dev->tag_success_count++;
1868         /*
1869          * Some devices deal with temporary internal resource
1870          * shortages by returning queue full.  When the queue
1871          * full occurrs, we throttle back.  Slowly try to get
1872          * back to our previous queue depth.
1873          */
1874         if ((dev->openings + dev->active) < dev->maxtags
1875          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1876                 dev->tag_success_count = 0;
1877                 dev->openings++;
1878         }
1879
1880         if (dev->active == 0)
1881                 dev->commands_since_idle_or_otag = 0;
1882
1883         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1884                 printf("Recovery SCB completes\n");
1885                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1886                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1887                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1888
1889                 if (ahd->platform_data->eh_done)
1890                         complete(ahd->platform_data->eh_done);
1891         }
1892
1893         ahd_free_scb(ahd, scb);
1894         ahd_linux_queue_cmd_complete(ahd, cmd);
1895 }
1896
1897 static void
1898 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1899                              struct scsi_device *sdev, struct scb *scb)
1900 {
1901         struct  ahd_devinfo devinfo;
1902         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1903
1904         ahd_compile_devinfo(&devinfo,
1905                             ahd->our_id,
1906                             sdev->sdev_target->id, sdev->lun,
1907                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1908                             ROLE_INITIATOR);
1909
1910         /*
1911          * We don't currently trust the mid-layer to
1912          * properly deal with queue full or busy.  So,
1913          * when one occurs, we tell the mid-layer to
1914          * unconditionally requeue the command to us
1915          * so that we can retry it ourselves.  We also
1916          * implement our own throttling mechanism so
1917          * we don't clobber the device with too many
1918          * commands.
1919          */
1920         switch (ahd_get_scsi_status(scb)) {
1921         default:
1922                 break;
1923         case SCSI_STATUS_CHECK_COND:
1924         case SCSI_STATUS_CMD_TERMINATED:
1925         {
1926                 struct scsi_cmnd *cmd;
1927
1928                 /*
1929                  * Copy sense information to the OS's cmd
1930                  * structure if it is available.
1931                  */
1932                 cmd = scb->io_ctx;
1933                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1934                         struct scsi_status_iu_header *siu;
1935                         u_int sense_size;
1936                         u_int sense_offset;
1937
1938                         if (scb->flags & SCB_SENSE) {
1939                                 sense_size = min(sizeof(struct scsi_sense_data)
1940                                                - ahd_get_sense_residual(scb),
1941                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1942                                 sense_offset = 0;
1943                         } else {
1944                                 /*
1945                                  * Copy only the sense data into the provided
1946                                  * buffer.
1947                                  */
1948                                 siu = (struct scsi_status_iu_header *)
1949                                     scb->sense_data;
1950                                 sense_size = min_t(size_t,
1951                                                 scsi_4btoul(siu->sense_length),
1952                                                 SCSI_SENSE_BUFFERSIZE);
1953                                 sense_offset = SIU_SENSE_OFFSET(siu);
1954                         }
1955
1956                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1957                         memcpy(cmd->sense_buffer,
1958                                ahd_get_sense_buf(ahd, scb)
1959                                + sense_offset, sense_size);
1960                         cmd->result |= (DRIVER_SENSE << 24);
1961
1962 #ifdef AHD_DEBUG
1963                         if (ahd_debug & AHD_SHOW_SENSE) {
1964                                 int i;
1965
1966                                 printf("Copied %d bytes of sense data at %d:",
1967                                        sense_size, sense_offset);
1968                                 for (i = 0; i < sense_size; i++) {
1969                                         if ((i & 0xF) == 0)
1970                                                 printf("\n");
1971                                         printf("0x%x ", cmd->sense_buffer[i]);
1972                                 }
1973                                 printf("\n");
1974                         }
1975 #endif
1976                 }
1977                 break;
1978         }
1979         case SCSI_STATUS_QUEUE_FULL:
1980                 /*
1981                  * By the time the core driver has returned this
1982                  * command, all other commands that were queued
1983                  * to us but not the device have been returned.
1984                  * This ensures that dev->active is equal to
1985                  * the number of commands actually queued to
1986                  * the device.
1987                  */
1988                 dev->tag_success_count = 0;
1989                 if (dev->active != 0) {
1990                         /*
1991                          * Drop our opening count to the number
1992                          * of commands currently outstanding.
1993                          */
1994                         dev->openings = 0;
1995 #ifdef AHD_DEBUG
1996                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1997                                 ahd_print_path(ahd, scb);
1998                                 printf("Dropping tag count to %d\n",
1999                                        dev->active);
2000                         }
2001 #endif
2002                         if (dev->active == dev->tags_on_last_queuefull) {
2003
2004                                 dev->last_queuefull_same_count++;
2005                                 /*
2006                                  * If we repeatedly see a queue full
2007                                  * at the same queue depth, this
2008                                  * device has a fixed number of tag
2009                                  * slots.  Lock in this tag depth
2010                                  * so we stop seeing queue fulls from
2011                                  * this device.
2012                                  */
2013                                 if (dev->last_queuefull_same_count
2014                                  == AHD_LOCK_TAGS_COUNT) {
2015                                         dev->maxtags = dev->active;
2016                                         ahd_print_path(ahd, scb);
2017                                         printf("Locking max tag count at %d\n",
2018                                                dev->active);
2019                                 }
2020                         } else {
2021                                 dev->tags_on_last_queuefull = dev->active;
2022                                 dev->last_queuefull_same_count = 0;
2023                         }
2024                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2025                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2026                         ahd_platform_set_tags(ahd, sdev, &devinfo,
2027                                      (dev->flags & AHD_DEV_Q_BASIC)
2028                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2029                         break;
2030                 }
2031                 /*
2032                  * Drop down to a single opening, and treat this
2033                  * as if the target returned BUSY SCSI status.
2034                  */
2035                 dev->openings = 1;
2036                 ahd_platform_set_tags(ahd, sdev, &devinfo,
2037                              (dev->flags & AHD_DEV_Q_BASIC)
2038                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2039                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2040         }
2041 }
2042
2043 static void
2044 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2045 {
2046         int status;
2047         int new_status = DID_OK;
2048         int do_fallback = 0;
2049         int scsi_status;
2050
2051         /*
2052          * Map CAM error codes into Linux Error codes.  We
2053          * avoid the conversion so that the DV code has the
2054          * full error information available when making
2055          * state change decisions.
2056          */
2057
2058         status = ahd_cmd_get_transaction_status(cmd);
2059         switch (status) {
2060         case CAM_REQ_INPROG:
2061         case CAM_REQ_CMP:
2062                 new_status = DID_OK;
2063                 break;
2064         case CAM_AUTOSENSE_FAIL:
2065                 new_status = DID_ERROR;
2066                 /* Fallthrough */
2067         case CAM_SCSI_STATUS_ERROR:
2068                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2069
2070                 switch(scsi_status) {
2071                 case SCSI_STATUS_CMD_TERMINATED:
2072                 case SCSI_STATUS_CHECK_COND:
2073                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2074                                 do_fallback = 1;
2075                         } else {
2076                                 struct scsi_sense_data *sense;
2077
2078                                 sense = (struct scsi_sense_data *)
2079                                         cmd->sense_buffer;
2080                                 if (sense->extra_len >= 5 &&
2081                                     (sense->add_sense_code == 0x47
2082                                      || sense->add_sense_code == 0x48))
2083                                         do_fallback = 1;
2084                         }
2085                         break;
2086                 default:
2087                         break;
2088                 }
2089                 break;
2090         case CAM_REQ_ABORTED:
2091                 new_status = DID_ABORT;
2092                 break;
2093         case CAM_BUSY:
2094                 new_status = DID_BUS_BUSY;
2095                 break;
2096         case CAM_REQ_INVALID:
2097         case CAM_PATH_INVALID:
2098                 new_status = DID_BAD_TARGET;
2099                 break;
2100         case CAM_SEL_TIMEOUT:
2101                 new_status = DID_NO_CONNECT;
2102                 break;
2103         case CAM_SCSI_BUS_RESET:
2104         case CAM_BDR_SENT:
2105                 new_status = DID_RESET;
2106                 break;
2107         case CAM_UNCOR_PARITY:
2108                 new_status = DID_PARITY;
2109                 do_fallback = 1;
2110                 break;
2111         case CAM_CMD_TIMEOUT:
2112                 new_status = DID_TIME_OUT;
2113                 do_fallback = 1;
2114                 break;
2115         case CAM_REQ_CMP_ERR:
2116         case CAM_UNEXP_BUSFREE:
2117         case CAM_DATA_RUN_ERR:
2118                 new_status = DID_ERROR;
2119                 do_fallback = 1;
2120                 break;
2121         case CAM_UA_ABORT:
2122         case CAM_NO_HBA:
2123         case CAM_SEQUENCE_FAIL:
2124         case CAM_CCB_LEN_ERR:
2125         case CAM_PROVIDE_FAIL:
2126         case CAM_REQ_TERMIO:
2127         case CAM_UNREC_HBA_ERROR:
2128         case CAM_REQ_TOO_BIG:
2129                 new_status = DID_ERROR;
2130                 break;
2131         case CAM_REQUEUE_REQ:
2132                 new_status = DID_REQUEUE;
2133                 break;
2134         default:
2135                 /* We should never get here */
2136                 new_status = DID_ERROR;
2137                 break;
2138         }
2139
2140         if (do_fallback) {
2141                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2142                        ahd_name(ahd), status, cmd->device->channel,
2143                        cmd->device->id, cmd->device->lun);
2144         }
2145
2146         ahd_cmd_set_transaction_status(cmd, new_status);
2147
2148         cmd->scsi_done(cmd);
2149 }
2150
2151 static void
2152 ahd_freeze_simq(struct ahd_softc *ahd)
2153 {
2154         scsi_block_requests(ahd->platform_data->host);
2155 }
2156
2157 static void
2158 ahd_release_simq(struct ahd_softc *ahd)
2159 {
2160         scsi_unblock_requests(ahd->platform_data->host);
2161 }
2162
2163 static int
2164 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2165 {
2166         struct ahd_softc *ahd;
2167         struct ahd_linux_device *dev;
2168         struct scb *pending_scb;
2169         u_int  saved_scbptr;
2170         u_int  active_scbptr;
2171         u_int  last_phase;
2172         u_int  saved_scsiid;
2173         u_int  cdb_byte;
2174         int    retval;
2175         int    was_paused;
2176         int    paused;
2177         int    wait;
2178         int    disconnected;
2179         ahd_mode_state saved_modes;
2180         unsigned long flags;
2181
2182         pending_scb = NULL;
2183         paused = FALSE;
2184         wait = FALSE;
2185         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2186
2187         scmd_printk(KERN_INFO, cmd,
2188                     "Attempting to queue an ABORT message:");
2189
2190         printf("CDB:");
2191         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2192                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2193         printf("\n");
2194
2195         ahd_lock(ahd, &flags);
2196
2197         /*
2198          * First determine if we currently own this command.
2199          * Start by searching the device queue.  If not found
2200          * there, check the pending_scb list.  If not found
2201          * at all, and the system wanted us to just abort the
2202          * command, return success.
2203          */
2204         dev = scsi_transport_device_data(cmd->device);
2205
2206         if (dev == NULL) {
2207                 /*
2208                  * No target device for this command exists,
2209                  * so we must not still own the command.
2210                  */
2211                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2212                 retval = SUCCESS;
2213                 goto no_cmd;
2214         }
2215
2216         /*
2217          * See if we can find a matching cmd in the pending list.
2218          */
2219         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2220                 if (pending_scb->io_ctx == cmd)
2221                         break;
2222         }
2223
2224         if (pending_scb == NULL) {
2225                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2226                 goto no_cmd;
2227         }
2228
2229         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2230                 /*
2231                  * We can't queue two recovery actions using the same SCB
2232                  */
2233                 retval = FAILED;
2234                 goto  done;
2235         }
2236
2237         /*
2238          * Ensure that the card doesn't do anything
2239          * behind our back.  Also make sure that we
2240          * didn't "just" miss an interrupt that would
2241          * affect this cmd.
2242          */
2243         was_paused = ahd_is_paused(ahd);
2244         ahd_pause_and_flushwork(ahd);
2245         paused = TRUE;
2246
2247         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2248                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2249                 goto no_cmd;
2250         }
2251
2252         printf("%s: At time of recovery, card was %spaused\n",
2253                ahd_name(ahd), was_paused ? "" : "not ");
2254         ahd_dump_card_state(ahd);
2255
2256         disconnected = TRUE;
2257         if (ahd_search_qinfifo(ahd, cmd->device->id,
2258                                cmd->device->channel + 'A',
2259                                cmd->device->lun,
2260                                pending_scb->hscb->tag,
2261                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2262                                SEARCH_COMPLETE) > 0) {
2263                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2264                        ahd_name(ahd), cmd->device->channel,
2265                        cmd->device->id, cmd->device->lun);
2266                 retval = SUCCESS;
2267                 goto done;
2268         }
2269
2270         saved_modes = ahd_save_modes(ahd);
2271         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2272         last_phase = ahd_inb(ahd, LASTPHASE);
2273         saved_scbptr = ahd_get_scbptr(ahd);
2274         active_scbptr = saved_scbptr;
2275         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2276                 struct scb *bus_scb;
2277
2278                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2279                 if (bus_scb == pending_scb)
2280                         disconnected = FALSE;
2281         }
2282
2283         /*
2284          * At this point, pending_scb is the scb associated with the
2285          * passed in command.  That command is currently active on the
2286          * bus or is in the disconnected state.
2287          */
2288         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2289         if (last_phase != P_BUSFREE
2290             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2291
2292                 /*
2293                  * We're active on the bus, so assert ATN
2294                  * and hope that the target responds.
2295                  */
2296                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2297                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2298                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2299                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2300                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2301                 wait = TRUE;
2302         } else if (disconnected) {
2303
2304                 /*
2305                  * Actually re-queue this SCB in an attempt
2306                  * to select the device before it reconnects.
2307                  */
2308                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2309                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2310                 pending_scb->hscb->cdb_len = 0;
2311                 pending_scb->hscb->task_attribute = 0;
2312                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2313
2314                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2315                         /*
2316                          * Mark the SCB has having an outstanding
2317                          * task management function.  Should the command
2318                          * complete normally before the task management
2319                          * function can be sent, the host will be notified
2320                          * to abort our requeued SCB.
2321                          */
2322                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2323                                  pending_scb->hscb->task_management);
2324                 } else {
2325                         /*
2326                          * If non-packetized, set the MK_MESSAGE control
2327                          * bit indicating that we desire to send a message.
2328                          * We also set the disconnected flag since there is
2329                          * no guarantee that our SCB control byte matches
2330                          * the version on the card.  We don't want the
2331                          * sequencer to abort the command thinking an
2332                          * unsolicited reselection occurred.
2333                          */
2334                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2335
2336                         /*
2337                          * The sequencer will never re-reference the
2338                          * in-core SCB.  To make sure we are notified
2339                          * during reselection, set the MK_MESSAGE flag in
2340                          * the card's copy of the SCB.
2341                          */
2342                         ahd_outb(ahd, SCB_CONTROL,
2343                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2344                 }
2345
2346                 /*
2347                  * Clear out any entries in the QINFIFO first
2348                  * so we are the next SCB for this target
2349                  * to run.
2350                  */
2351                 ahd_search_qinfifo(ahd, cmd->device->id,
2352                                    cmd->device->channel + 'A', cmd->device->lun,
2353                                    SCB_LIST_NULL, ROLE_INITIATOR,
2354                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2355                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2356                 ahd_set_scbptr(ahd, saved_scbptr);
2357                 ahd_print_path(ahd, pending_scb);
2358                 printf("Device is disconnected, re-queuing SCB\n");
2359                 wait = TRUE;
2360         } else {
2361                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2362                 retval = FAILED;
2363                 goto done;
2364         }
2365
2366 no_cmd:
2367         /*
2368          * Our assumption is that if we don't have the command, no
2369          * recovery action was required, so we return success.  Again,
2370          * the semantics of the mid-layer recovery engine are not
2371          * well defined, so this may change in time.
2372          */
2373         retval = SUCCESS;
2374 done:
2375         if (paused)
2376                 ahd_unpause(ahd);
2377         if (wait) {
2378                 DECLARE_COMPLETION_ONSTACK(done);
2379
2380                 ahd->platform_data->eh_done = &done;
2381                 ahd_unlock(ahd, &flags);
2382
2383                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2384                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2385                         ahd_lock(ahd, &flags);
2386                         ahd->platform_data->eh_done = NULL;
2387                         ahd_unlock(ahd, &flags);
2388                         printf("%s: Timer Expired (active %d)\n",
2389                                ahd_name(ahd), dev->active);
2390                         retval = FAILED;
2391                 }
2392                 printf("Recovery code awake\n");
2393         } else
2394                 ahd_unlock(ahd, &flags);
2395
2396         if (retval != SUCCESS)
2397                 printf("%s: Command abort returning 0x%x\n",
2398                        ahd_name(ahd), retval);
2399
2400         return retval;
2401 }
2402
2403 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2404 {
2405         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2406         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2407         struct ahd_devinfo devinfo;
2408         unsigned long flags;
2409
2410         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2411                             starget->channel + 'A', ROLE_INITIATOR);
2412         ahd_lock(ahd, &flags);
2413         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2414         ahd_unlock(ahd, &flags);
2415 }
2416
2417 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2418 {
2419         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2420         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2421         struct ahd_tmode_tstate *tstate;
2422         struct ahd_initiator_tinfo *tinfo
2423                 = ahd_fetch_transinfo(ahd,
2424                                       starget->channel + 'A',
2425                                       shost->this_id, starget->id, &tstate);
2426         struct ahd_devinfo devinfo;
2427         unsigned int ppr_options = tinfo->goal.ppr_options;
2428         unsigned int dt;
2429         unsigned long flags;
2430         unsigned long offset = tinfo->goal.offset;
2431
2432 #ifdef AHD_DEBUG
2433         if ((ahd_debug & AHD_SHOW_DV) != 0)
2434                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2435 #endif
2436         if (offset == 0)
2437                 offset = MAX_OFFSET;
2438
2439         if (period < 8)
2440                 period = 8;
2441         if (period < 10) {
2442                 if (spi_max_width(starget)) {
2443                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2444                         if (period == 8)
2445                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2446                 } else
2447                         period = 10;
2448         }
2449
2450         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2451
2452         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2453                             starget->channel + 'A', ROLE_INITIATOR);
2454
2455         /* all PPR requests apart from QAS require wide transfers */
2456         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2457                 if (spi_width(starget) == 0)
2458                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2459         }
2460
2461         ahd_find_syncrate(ahd, &period, &ppr_options,
2462                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2463
2464         ahd_lock(ahd, &flags);
2465         ahd_set_syncrate(ahd, &devinfo, period, offset,
2466                          ppr_options, AHD_TRANS_GOAL, FALSE);
2467         ahd_unlock(ahd, &flags);
2468 }
2469
2470 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2471 {
2472         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2473         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2474         struct ahd_tmode_tstate *tstate;
2475         struct ahd_initiator_tinfo *tinfo
2476                 = ahd_fetch_transinfo(ahd,
2477                                       starget->channel + 'A',
2478                                       shost->this_id, starget->id, &tstate);
2479         struct ahd_devinfo devinfo;
2480         unsigned int ppr_options = 0;
2481         unsigned int period = 0;
2482         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2483         unsigned long flags;
2484
2485 #ifdef AHD_DEBUG
2486         if ((ahd_debug & AHD_SHOW_DV) != 0)
2487                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2488 #endif
2489
2490         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2491                             starget->channel + 'A', ROLE_INITIATOR);
2492         if (offset != 0) {
2493                 period = tinfo->goal.period;
2494                 ppr_options = tinfo->goal.ppr_options;
2495                 ahd_find_syncrate(ahd, &period, &ppr_options,
2496                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2497         }
2498
2499         ahd_lock(ahd, &flags);
2500         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2501                          AHD_TRANS_GOAL, FALSE);
2502         ahd_unlock(ahd, &flags);
2503 }
2504
2505 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2506 {
2507         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2508         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2509         struct ahd_tmode_tstate *tstate;
2510         struct ahd_initiator_tinfo *tinfo
2511                 = ahd_fetch_transinfo(ahd,
2512                                       starget->channel + 'A',
2513                                       shost->this_id, starget->id, &tstate);
2514         struct ahd_devinfo devinfo;
2515         unsigned int ppr_options = tinfo->goal.ppr_options
2516                 & ~MSG_EXT_PPR_DT_REQ;
2517         unsigned int period = tinfo->goal.period;
2518         unsigned int width = tinfo->goal.width;
2519         unsigned long flags;
2520
2521 #ifdef AHD_DEBUG
2522         if ((ahd_debug & AHD_SHOW_DV) != 0)
2523                 printf("%s: %s DT\n", ahd_name(ahd),
2524                        dt ? "enabling" : "disabling");
2525 #endif
2526         if (dt && spi_max_width(starget)) {
2527                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2528                 if (!width)
2529                         ahd_linux_set_width(starget, 1);
2530         } else {
2531                 if (period <= 9)
2532                         period = 10; /* If resetting DT, period must be >= 25ns */
2533                 /* IU is invalid without DT set */
2534                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2535         }
2536         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2537                             starget->channel + 'A', ROLE_INITIATOR);
2538         ahd_find_syncrate(ahd, &period, &ppr_options,
2539                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2540
2541         ahd_lock(ahd, &flags);
2542         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2543                          ppr_options, AHD_TRANS_GOAL, FALSE);
2544         ahd_unlock(ahd, &flags);
2545 }
2546
2547 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2548 {
2549         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2550         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2551         struct ahd_tmode_tstate *tstate;
2552         struct ahd_initiator_tinfo *tinfo
2553                 = ahd_fetch_transinfo(ahd,
2554                                       starget->channel + 'A',
2555                                       shost->this_id, starget->id, &tstate);
2556         struct ahd_devinfo devinfo;
2557         unsigned int ppr_options = tinfo->goal.ppr_options
2558                 & ~MSG_EXT_PPR_QAS_REQ;
2559         unsigned int period = tinfo->goal.period;
2560         unsigned int dt;
2561         unsigned long flags;
2562
2563 #ifdef AHD_DEBUG
2564         if ((ahd_debug & AHD_SHOW_DV) != 0)
2565                 printf("%s: %s QAS\n", ahd_name(ahd),
2566                        qas ? "enabling" : "disabling");
2567 #endif
2568
2569         if (qas) {
2570                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2571         }
2572
2573         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2574
2575         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2576                             starget->channel + 'A', ROLE_INITIATOR);
2577         ahd_find_syncrate(ahd, &period, &ppr_options,
2578                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2579
2580         ahd_lock(ahd, &flags);
2581         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2582                          ppr_options, AHD_TRANS_GOAL, FALSE);
2583         ahd_unlock(ahd, &flags);
2584 }
2585
2586 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2587 {
2588         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2589         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2590         struct ahd_tmode_tstate *tstate;
2591         struct ahd_initiator_tinfo *tinfo
2592                 = ahd_fetch_transinfo(ahd,
2593                                       starget->channel + 'A',
2594                                       shost->this_id, starget->id, &tstate);
2595         struct ahd_devinfo devinfo;
2596         unsigned int ppr_options = tinfo->goal.ppr_options
2597                 & ~MSG_EXT_PPR_IU_REQ;
2598         unsigned int period = tinfo->goal.period;
2599         unsigned int dt;
2600         unsigned long flags;
2601
2602 #ifdef AHD_DEBUG
2603         if ((ahd_debug & AHD_SHOW_DV) != 0)
2604                 printf("%s: %s IU\n", ahd_name(ahd),
2605                        iu ? "enabling" : "disabling");
2606 #endif
2607
2608         if (iu && spi_max_width(starget)) {
2609                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2610                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2611         }
2612
2613         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2614
2615         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2616                             starget->channel + 'A', ROLE_INITIATOR);
2617         ahd_find_syncrate(ahd, &period, &ppr_options,
2618                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2619
2620         ahd_lock(ahd, &flags);
2621         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2622                          ppr_options, AHD_TRANS_GOAL, FALSE);
2623         ahd_unlock(ahd, &flags);
2624 }
2625
2626 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2627 {
2628         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2629         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2630         struct ahd_tmode_tstate *tstate;
2631         struct ahd_initiator_tinfo *tinfo
2632                 = ahd_fetch_transinfo(ahd,
2633                                       starget->channel + 'A',
2634                                       shost->this_id, starget->id, &tstate);
2635         struct ahd_devinfo devinfo;
2636         unsigned int ppr_options = tinfo->goal.ppr_options
2637                 & ~MSG_EXT_PPR_RD_STRM;
2638         unsigned int period = tinfo->goal.period;
2639         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2640         unsigned long flags;
2641
2642 #ifdef AHD_DEBUG
2643         if ((ahd_debug & AHD_SHOW_DV) != 0)
2644                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2645                        rdstrm  ? "enabling" : "disabling");
2646 #endif
2647
2648         if (rdstrm && spi_max_width(starget))
2649                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2650
2651         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2652                             starget->channel + 'A', ROLE_INITIATOR);
2653         ahd_find_syncrate(ahd, &period, &ppr_options,
2654                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2655
2656         ahd_lock(ahd, &flags);
2657         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2658                          ppr_options, AHD_TRANS_GOAL, FALSE);
2659         ahd_unlock(ahd, &flags);
2660 }
2661
2662 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2663 {
2664         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2665         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2666         struct ahd_tmode_tstate *tstate;
2667         struct ahd_initiator_tinfo *tinfo
2668                 = ahd_fetch_transinfo(ahd,
2669                                       starget->channel + 'A',
2670                                       shost->this_id, starget->id, &tstate);
2671         struct ahd_devinfo devinfo;
2672         unsigned int ppr_options = tinfo->goal.ppr_options
2673                 & ~MSG_EXT_PPR_WR_FLOW;
2674         unsigned int period = tinfo->goal.period;
2675         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2676         unsigned long flags;
2677
2678 #ifdef AHD_DEBUG
2679         if ((ahd_debug & AHD_SHOW_DV) != 0)
2680                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2681                        wrflow ? "enabling" : "disabling");
2682 #endif
2683
2684         if (wrflow && spi_max_width(starget))
2685                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2686
2687         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2688                             starget->channel + 'A', ROLE_INITIATOR);
2689         ahd_find_syncrate(ahd, &period, &ppr_options,
2690                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2691
2692         ahd_lock(ahd, &flags);
2693         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2694                          ppr_options, AHD_TRANS_GOAL, FALSE);
2695         ahd_unlock(ahd, &flags);
2696 }
2697
2698 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2699 {
2700         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2701         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2702         struct ahd_tmode_tstate *tstate;
2703         struct ahd_initiator_tinfo *tinfo
2704                 = ahd_fetch_transinfo(ahd,
2705                                       starget->channel + 'A',
2706                                       shost->this_id, starget->id, &tstate);
2707         struct ahd_devinfo devinfo;
2708         unsigned int ppr_options = tinfo->goal.ppr_options
2709                 & ~MSG_EXT_PPR_RTI;
2710         unsigned int period = tinfo->goal.period;
2711         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2712         unsigned long flags;
2713
2714         if ((ahd->features & AHD_RTI) == 0) {
2715 #ifdef AHD_DEBUG
2716                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2717                         printf("%s: RTI not available\n", ahd_name(ahd));
2718 #endif
2719                 return;
2720         }
2721
2722 #ifdef AHD_DEBUG
2723         if ((ahd_debug & AHD_SHOW_DV) != 0)
2724                 printf("%s: %s RTI\n", ahd_name(ahd),
2725                        rti ? "enabling" : "disabling");
2726 #endif
2727
2728         if (rti && spi_max_width(starget))
2729                 ppr_options |= MSG_EXT_PPR_RTI;
2730
2731         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2732                             starget->channel + 'A', ROLE_INITIATOR);
2733         ahd_find_syncrate(ahd, &period, &ppr_options,
2734                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2735
2736         ahd_lock(ahd, &flags);
2737         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2738                          ppr_options, AHD_TRANS_GOAL, FALSE);
2739         ahd_unlock(ahd, &flags);
2740 }
2741
2742 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2743 {
2744         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2745         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2746         struct ahd_tmode_tstate *tstate;
2747         struct ahd_initiator_tinfo *tinfo
2748                 = ahd_fetch_transinfo(ahd,
2749                                       starget->channel + 'A',
2750                                       shost->this_id, starget->id, &tstate);
2751         struct ahd_devinfo devinfo;
2752         unsigned int ppr_options = tinfo->goal.ppr_options
2753                 & ~MSG_EXT_PPR_PCOMP_EN;
2754         unsigned int period = tinfo->goal.period;
2755         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2756         unsigned long flags;
2757
2758 #ifdef AHD_DEBUG
2759         if ((ahd_debug & AHD_SHOW_DV) != 0)
2760                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2761                        pcomp ? "Enable" : "Disable");
2762 #endif
2763
2764         if (pcomp && spi_max_width(starget)) {
2765                 uint8_t precomp;
2766
2767                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2768                         const struct ahd_linux_iocell_opts *iocell_opts;
2769
2770                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2771                         precomp = iocell_opts->precomp;
2772                 } else {
2773                         precomp = AIC79XX_DEFAULT_PRECOMP;
2774                 }
2775                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2776                 AHD_SET_PRECOMP(ahd, precomp);
2777         } else {
2778                 AHD_SET_PRECOMP(ahd, 0);
2779         }
2780
2781         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2782                             starget->channel + 'A', ROLE_INITIATOR);
2783         ahd_find_syncrate(ahd, &period, &ppr_options,
2784                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2785
2786         ahd_lock(ahd, &flags);
2787         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2788                          ppr_options, AHD_TRANS_GOAL, FALSE);
2789         ahd_unlock(ahd, &flags);
2790 }
2791
2792 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2793 {
2794         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2795         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2796         struct ahd_tmode_tstate *tstate;
2797         struct ahd_initiator_tinfo *tinfo
2798                 = ahd_fetch_transinfo(ahd,
2799                                       starget->channel + 'A',
2800                                       shost->this_id, starget->id, &tstate);
2801         struct ahd_devinfo devinfo;
2802         unsigned int ppr_options = tinfo->goal.ppr_options
2803                 & ~MSG_EXT_PPR_HOLD_MCS;
2804         unsigned int period = tinfo->goal.period;
2805         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2806         unsigned long flags;
2807
2808         if (hold && spi_max_width(starget))
2809                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2810
2811         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2812                             starget->channel + 'A', ROLE_INITIATOR);
2813         ahd_find_syncrate(ahd, &period, &ppr_options,
2814                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2815
2816         ahd_lock(ahd, &flags);
2817         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2818                          ppr_options, AHD_TRANS_GOAL, FALSE);
2819         ahd_unlock(ahd, &flags);
2820 }
2821
2822 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2823 {
2824         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2825         unsigned long flags;
2826         u8 mode;
2827
2828         ahd_lock(ahd, &flags);
2829         ahd_pause(ahd);
2830         mode = ahd_inb(ahd, SBLKCTL);
2831         ahd_unpause(ahd);
2832         ahd_unlock(ahd, &flags);
2833
2834         if (mode & ENAB40)
2835                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2836         else if (mode & ENAB20)
2837                 spi_signalling(shost) = SPI_SIGNAL_SE;
2838         else
2839                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2840 }
2841
2842 static struct spi_function_template ahd_linux_transport_functions = {
2843         .set_offset     = ahd_linux_set_offset,
2844         .show_offset    = 1,
2845         .set_period     = ahd_linux_set_period,
2846         .show_period    = 1,
2847         .set_width      = ahd_linux_set_width,
2848         .show_width     = 1,
2849         .set_dt         = ahd_linux_set_dt,
2850         .show_dt        = 1,
2851         .set_iu         = ahd_linux_set_iu,
2852         .show_iu        = 1,
2853         .set_qas        = ahd_linux_set_qas,
2854         .show_qas       = 1,
2855         .set_rd_strm    = ahd_linux_set_rd_strm,
2856         .show_rd_strm   = 1,
2857         .set_wr_flow    = ahd_linux_set_wr_flow,
2858         .show_wr_flow   = 1,
2859         .set_rti        = ahd_linux_set_rti,
2860         .show_rti       = 1,
2861         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2862         .show_pcomp_en  = 1,
2863         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2864         .show_hold_mcs  = 1,
2865         .get_signalling = ahd_linux_get_signalling,
2866 };
2867
2868 static int __init
2869 ahd_linux_init(void)
2870 {
2871         int     error = 0;
2872
2873         /*
2874          * If we've been passed any parameters, process them now.
2875          */
2876         if (aic79xx)
2877                 aic79xx_setup(aic79xx);
2878
2879         ahd_linux_transport_template =
2880                 spi_attach_transport(&ahd_linux_transport_functions);
2881         if (!ahd_linux_transport_template)
2882                 return -ENODEV;
2883
2884         scsi_transport_reserve_device(ahd_linux_transport_template,
2885                                       sizeof(struct ahd_linux_device));
2886
2887         error = ahd_linux_pci_init();
2888         if (error)
2889                 spi_release_transport(ahd_linux_transport_template);
2890         return error;
2891 }
2892
2893 static void __exit
2894 ahd_linux_exit(void)
2895 {
2896         ahd_linux_pci_exit();
2897         spi_release_transport(ahd_linux_transport_template);
2898 }
2899
2900 module_init(ahd_linux_init);
2901 module_exit(ahd_linux_exit);